js 实现textarea剩余字数统计

 1 针对textarea剩余字数统计
 2 <div class="fankui-textarea">
 3     <span>留言：</span> <span class="wordwrap fr">你还可以输入<var class="word">500</var>个字</span>
 4     <textarea name="content" placeholder="此处限定500字"></textarea>
 5 </div>
 6 <script>
 7 /*textarea还剩余字数统计*/
 8 $(function () {
 9     var wordCount = $('.fankui-textarea');
10     var textArea = wordCount.find('textarea');
11     var  word = wordCount.find(".word");
12     statInputNum(textArea, word);
13 });
14 function statInputNum(textArea, word) {
15     var max = word.text();
16     var curLength;
17     textArea[0].setAttribute('maxlength', max);
18     curLength = textArea.val().length;
19     word.text(max-curLength);
20     textArea.on('input propertychange', function () {
21         var _value = $(this).val().replace(/\n/gi,"");
22         word.text(max - _value.length);
23     });
24 }
25 </script>